Move a chunk of gamma-specific code out of drm_dma.h. Remove unused

    'DRM_FLAG_NOCTX' option.

12 files changed, 326 insertions, 584 deletions

diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 338345be..c530ca0c 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -127,7 +127,6 @@
 #define DRM_LOCK_SLICE	      1	/* Time slice for lock, in jiffies	  */
 
 #define DRM_FLAG_DEBUG	  0x01
-#define DRM_FLAG_NOCTX	  0x02
 
 #define DRM_MEM_DMA	   0
 #define DRM_MEM_SAREA	   1
@@ -814,15 +813,6 @@ extern int	     DRM(dma_setup)(drm_device_t *dev);
 extern void	     DRM(dma_takedown)(drm_device_t *dev);
 extern void	     DRM(free_buffer)(drm_device_t *dev, drm_buf_t *buf);
 extern void	     DRM(reclaim_buffers)( struct file *filp );
-#if __HAVE_OLD_DMA
-/* GH: This is a dirty hack for now...
- */
-extern void	     DRM(clear_next_buffer)(drm_device_t *dev);
-extern int	     DRM(select_queue)(drm_device_t *dev,
-				       void (*wrapper)(unsigned long));
-extern int	     DRM(dma_enqueue)(struct file *filp, drm_dma_t *dma);
-extern int	     DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma);
-#endif
 #if __HAVE_DMA_IRQ
 extern int           DRM(control)( struct inode *inode, struct file *filp,
 				   unsigned int cmd, unsigned long arg );
diff --git a/linux-core/drm_context.c b/linux-core/drm_context.c
index 646b2236..b446956c 100644
--- a/linux-core/drm_context.c
+++ b/linux-core/drm_context.c
@@ -36,6 +36,11 @@
 #define __NO_VERSION__
 #include "drmP.h"
 
+#if !__HAVE_CTX_BITMAP
+#error "__HAVE_CTX_BITMAP must be defined"
+#endif
+
+
 /* ================================================================
  * Context bitmap support
  */
@@ -235,10 +240,6 @@ int DRM(context_switch)( drm_device_t *dev, int old, int new )
                 return 0;
         }
 
-        if ( DRM(flags) & DRM_FLAG_NOCTX ) {
-                DRM(context_switch_complete)( dev, new );
-        }
-
         return 0;
 }
 
diff --git a/linux-core/drm_dma.c b/linux-core/drm_dma.c
index 45c4d321..640e245d 100644
--- a/linux-core/drm_dma.c
+++ b/linux-core/drm_dma.c
@@ -180,276 +180,6 @@ void DRM(reclaim_buffers)( struct file *filp )
 #endif
 
 
-/* GH: This is a big hack for now...
- */
-#if __HAVE_OLD_DMA
-
-void DRM(clear_next_buffer)(drm_device_t *dev)
-{
-	drm_device_dma_t *dma = dev->dma;
-
-	dma->next_buffer = NULL;
-	if (dma->next_queue && !DRM_BUFCOUNT(&dma->next_queue->waitlist)) {
-		wake_up_interruptible(&dma->next_queue->flush_queue);
-	}
-	dma->next_queue	 = NULL;
-}
-
-int DRM(select_queue)(drm_device_t *dev, void (*wrapper)(unsigned long))
-{
-	int	   i;
-	int	   candidate = -1;
-	int	   j	     = jiffies;
-
-	if (!dev) {
-		DRM_ERROR("No device\n");
-		return -1;
-	}
-	if (!dev->queuelist || !dev->queuelist[DRM_KERNEL_CONTEXT]) {
-				/* This only happens between the time the
-				   interrupt is initialized and the time
-				   the queues are initialized. */
-		return -1;
-	}
-
-				/* Doing "while locked" DMA? */
-	if (DRM_WAITCOUNT(dev, DRM_KERNEL_CONTEXT)) {
-		return DRM_KERNEL_CONTEXT;
-	}
-
-				/* If there are buffers on the last_context
-				   queue, and we have not been executing
-				   this context very long, continue to
-				   execute this context. */
-	if (dev->last_switch <= j
-	    && dev->last_switch + DRM_TIME_SLICE > j
-	    && DRM_WAITCOUNT(dev, dev->last_context)) {
-		return dev->last_context;
-	}
-
-				/* Otherwise, find a candidate */
-	for (i = dev->last_checked + 1; i < dev->queue_count; i++) {
-		if (DRM_WAITCOUNT(dev, i)) {
-			candidate = dev->last_checked = i;
-			break;
-		}
-	}
-
-	if (candidate < 0) {
-		for (i = 0; i < dev->queue_count; i++) {
-			if (DRM_WAITCOUNT(dev, i)) {
-				candidate = dev->last_checked = i;
-				break;
-			}
-		}
-	}
-
-	if (wrapper
-	    && candidate >= 0
-	    && candidate != dev->last_context
-	    && dev->last_switch <= j
-	    && dev->last_switch + DRM_TIME_SLICE > j) {
-		if (dev->timer.expires != dev->last_switch + DRM_TIME_SLICE) {
-			del_timer(&dev->timer);
-			dev->timer.function = wrapper;
-			dev->timer.data	    = (unsigned long)dev;
-			dev->timer.expires  = dev->last_switch+DRM_TIME_SLICE;
-			add_timer(&dev->timer);
-		}
-		return -1;
-	}
-
-	return candidate;
-}
-
-
-int DRM(dma_enqueue)(struct file *filp, drm_dma_t *d)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int		  i;
-	drm_queue_t	  *q;
-	drm_buf_t	  *buf;
-	int		  idx;
-	int		  while_locked = 0;
-	drm_device_dma_t  *dma = dev->dma;
-	DECLARE_WAITQUEUE(entry, current);
-
-	DRM_DEBUG("%d\n", d->send_count);
-
-	if (d->flags & _DRM_DMA_WHILE_LOCKED) {
-		int context = dev->lock.hw_lock->lock;
-
-		if (!_DRM_LOCK_IS_HELD(context)) {
-			DRM_ERROR("No lock held during \"while locked\""
-				  " request\n");
-			return -EINVAL;
-		}
-		if (d->context != _DRM_LOCKING_CONTEXT(context)
-		    && _DRM_LOCKING_CONTEXT(context) != DRM_KERNEL_CONTEXT) {
-			DRM_ERROR("Lock held by %d while %d makes"
-				  " \"while locked\" request\n",
-				  _DRM_LOCKING_CONTEXT(context),
-				  d->context);
-			return -EINVAL;
-		}
-		q = dev->queuelist[DRM_KERNEL_CONTEXT];
-		while_locked = 1;
-	} else {
-		q = dev->queuelist[d->context];
-	}
-
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->block_write)) {
-		add_wait_queue(&q->write_queue, &entry);
-		atomic_inc(&q->block_count);
-		for (;;) {
-			current->state = TASK_INTERRUPTIBLE;
-			if (!atomic_read(&q->block_write)) break;
-			schedule();
-			if (signal_pending(current)) {
-				atomic_dec(&q->use_count);
-				remove_wait_queue(&q->write_queue, &entry);
-				return -EINTR;
-			}
-		}
-		atomic_dec(&q->block_count);
-		current->state = TASK_RUNNING;
-		remove_wait_queue(&q->write_queue, &entry);
-	}
-
-	for (i = 0; i < d->send_count; i++) {
-		idx = d->send_indices[i];
-		if (idx < 0 || idx >= dma->buf_count) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Index %d (of %d max)\n",
-				  d->send_indices[i], dma->buf_count - 1);
-			return -EINVAL;
-		}
-		buf = dma->buflist[ idx ];
-		if (buf->filp != filp) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Process %d using buffer not owned\n",
-				  current->pid);
-			return -EINVAL;
-		}
-		if (buf->list != DRM_LIST_NONE) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Process %d using buffer %d on list %d\n",
-				  current->pid, buf->idx, buf->list);
-		}
-		buf->used	  = d->send_sizes[i];
-		buf->while_locked = while_locked;
-		buf->context	  = d->context;
-		if (!buf->used) {
-			DRM_ERROR("Queueing 0 length buffer\n");
-		}
-		if (buf->pending) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Queueing pending buffer:"
-				  " buffer %d, offset %d\n",
-				  d->send_indices[i], i);
-			return -EINVAL;
-		}
-		if (buf->waiting) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Queueing waiting buffer:"
-				  " buffer %d, offset %d\n",
-				  d->send_indices[i], i);
-			return -EINVAL;
-		}
-		buf->waiting = 1;
-		if (atomic_read(&q->use_count) == 1
-		    || atomic_read(&q->finalization)) {
-			DRM(free_buffer)(dev, buf);
-		} else {
-			DRM(waitlist_put)(&q->waitlist, buf);
-			atomic_inc(&q->total_queued);
-		}
-	}
-	atomic_dec(&q->use_count);
-
-	return 0;
-}
-
-static int DRM(dma_get_buffers_of_order)(struct file *filp, drm_dma_t *d,
-					 int order)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int		  i;
-	drm_buf_t	  *buf;
-	drm_device_dma_t  *dma = dev->dma;
-
-	for (i = d->granted_count; i < d->request_count; i++) {
-		buf = DRM(freelist_get)(&dma->bufs[order].freelist,
-					d->flags & _DRM_DMA_WAIT);
-		if (!buf) break;
-		if (buf->pending || buf->waiting) {
-			DRM_ERROR("Free buffer %d in use: filp %p (w%d, p%d)\n",
-				  buf->idx,
-				  buf->filp,
-				  buf->waiting,
-				  buf->pending);
-		}
-		buf->filp     = filp;
-		if (copy_to_user(&d->request_indices[i],
-				 &buf->idx,
-				 sizeof(buf->idx)))
-			return -EFAULT;
-
-		if (copy_to_user(&d->request_sizes[i],
-				 &buf->total,
-				 sizeof(buf->total)))
-			return -EFAULT;
-
-		++d->granted_count;
-	}
-	return 0;
-}
-
-
-int DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma)
-{
-	int		  order;
-	int		  retcode = 0;
-	int		  tmp_order;
-
-	order = DRM(order)(dma->request_size);
-
-	dma->granted_count = 0;
-	retcode		   = DRM(dma_get_buffers_of_order)(filp, dma, order);
-
-	if (dma->granted_count < dma->request_count
-	    && (dma->flags & _DRM_DMA_SMALLER_OK)) {
-		for (tmp_order = order - 1;
-		     !retcode
-			     && dma->granted_count < dma->request_count
-			     && tmp_order >= DRM_MIN_ORDER;
-		     --tmp_order) {
-
-			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
-								tmp_order);
-		}
-	}
-
-	if (dma->granted_count < dma->request_count
-	    && (dma->flags & _DRM_DMA_LARGER_OK)) {
-		for (tmp_order = order + 1;
-		     !retcode
-			     && dma->granted_count < dma->request_count
-			     && tmp_order <= DRM_MAX_ORDER;
-		     ++tmp_order) {
-
-			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
-								tmp_order);
-		}
-	}
-	return 0;
-}
-
-#endif /* __HAVE_OLD_DMA */
 
 
 #if __HAVE_DMA_IRQ
diff --git a/linux-core/drm_init.c b/linux-core/drm_init.c
index 2d6b6a3c..3aa4ad59 100644
--- a/linux-core/drm_init.c
+++ b/linux-core/drm_init.c
@@ -50,11 +50,6 @@ static void DRM(parse_option)(char *s)
 	for (c = s; *c && *c != ':'; c++); /* find : or \0 */
 	if (*c) r = c + 1; else r = NULL;  /* remember remainder */
 	*c = '\0';			   /* terminate */
-	if (!strcmp(s, "noctx")) {
-		DRM(flags) |= DRM_FLAG_NOCTX;
-		DRM_INFO("Server-mediated context switching OFF\n");
-		return;
-	}
 	if (!strcmp(s, "debug")) {
 		DRM(flags) |= DRM_FLAG_DEBUG;
 		DRM_INFO("Debug messages ON\n");
diff --git a/linux/drmP.h b/linux/drmP.h
index 338345be..c530ca0c 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -127,7 +127,6 @@
 #define DRM_LOCK_SLICE	      1	/* Time slice for lock, in jiffies	  */
 
 #define DRM_FLAG_DEBUG	  0x01
-#define DRM_FLAG_NOCTX	  0x02
 
 #define DRM_MEM_DMA	   0
 #define DRM_MEM_SAREA	   1
@@ -814,15 +813,6 @@ extern int	     DRM(dma_setup)(drm_device_t *dev);
 extern void	     DRM(dma_takedown)(drm_device_t *dev);
 extern void	     DRM(free_buffer)(drm_device_t *dev, drm_buf_t *buf);
 extern void	     DRM(reclaim_buffers)( struct file *filp );
-#if __HAVE_OLD_DMA
-/* GH: This is a dirty hack for now...
- */
-extern void	     DRM(clear_next_buffer)(drm_device_t *dev);
-extern int	     DRM(select_queue)(drm_device_t *dev,
-				       void (*wrapper)(unsigned long));
-extern int	     DRM(dma_enqueue)(struct file *filp, drm_dma_t *dma);
-extern int	     DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma);
-#endif
 #if __HAVE_DMA_IRQ
 extern int           DRM(control)( struct inode *inode, struct file *filp,
 				   unsigned int cmd, unsigned long arg );
diff --git a/linux/drm_context.h b/linux/drm_context.h
index 646b2236..b446956c 100644
--- a/linux/drm_context.h
+++ b/linux/drm_context.h
@@ -36,6 +36,11 @@
 #define __NO_VERSION__
 #include "drmP.h"
 
+#if !__HAVE_CTX_BITMAP
+#error "__HAVE_CTX_BITMAP must be defined"
+#endif
+
+
 /* ================================================================
  * Context bitmap support
  */
@@ -235,10 +240,6 @@ int DRM(context_switch)( drm_device_t *dev, int old, int new )
                 return 0;
         }
 
-        if ( DRM(flags) & DRM_FLAG_NOCTX ) {
-                DRM(context_switch_complete)( dev, new );
-        }
-
         return 0;
 }
 
diff --git a/linux/drm_dma.h b/linux/drm_dma.h
index 45c4d321..640e245d 100644
--- a/linux/drm_dma.h
+++ b/linux/drm_dma.h
@@ -180,276 +180,6 @@ void DRM(reclaim_buffers)( struct file *filp )
 #endif
 
 
-/* GH: This is a big hack for now...
- */
-#if __HAVE_OLD_DMA
-
-void DRM(clear_next_buffer)(drm_device_t *dev)
-{
-	drm_device_dma_t *dma = dev->dma;
-
-	dma->next_buffer = NULL;
-	if (dma->next_queue && !DRM_BUFCOUNT(&dma->next_queue->waitlist)) {
-		wake_up_interruptible(&dma->next_queue->flush_queue);
-	}
-	dma->next_queue	 = NULL;
-}
-
-int DRM(select_queue)(drm_device_t *dev, void (*wrapper)(unsigned long))
-{
-	int	   i;
-	int	   candidate = -1;
-	int	   j	     = jiffies;
-
-	if (!dev) {
-		DRM_ERROR("No device\n");
-		return -1;
-	}
-	if (!dev->queuelist || !dev->queuelist[DRM_KERNEL_CONTEXT]) {
-				/* This only happens between the time the
-				   interrupt is initialized and the time
-				   the queues are initialized. */
-		return -1;
-	}
-
-				/* Doing "while locked" DMA? */
-	if (DRM_WAITCOUNT(dev, DRM_KERNEL_CONTEXT)) {
-		return DRM_KERNEL_CONTEXT;
-	}
-
-				/* If there are buffers on the last_context
-				   queue, and we have not been executing
-				   this context very long, continue to
-				   execute this context. */
-	if (dev->last_switch <= j
-	    && dev->last_switch + DRM_TIME_SLICE > j
-	    && DRM_WAITCOUNT(dev, dev->last_context)) {
-		return dev->last_context;
-	}
-
-				/* Otherwise, find a candidate */
-	for (i = dev->last_checked + 1; i < dev->queue_count; i++) {
-		if (DRM_WAITCOUNT(dev, i)) {
-			candidate = dev->last_checked = i;
-			break;
-		}
-	}
-
-	if (candidate < 0) {
-		for (i = 0; i < dev->queue_count; i++) {
-			if (DRM_WAITCOUNT(dev, i)) {
-				candidate = dev->last_checked = i;
-				break;
-			}
-		}
-	}
-
-	if (wrapper
-	    && candidate >= 0
-	    && candidate != dev->last_context
-	    && dev->last_switch <= j
-	    && dev->last_switch + DRM_TIME_SLICE > j) {
-		if (dev->timer.expires != dev->last_switch + DRM_TIME_SLICE) {
-			del_timer(&dev->timer);
-			dev->timer.function = wrapper;
-			dev->timer.data	    = (unsigned long)dev;
-			dev->timer.expires  = dev->last_switch+DRM_TIME_SLICE;
-			add_timer(&dev->timer);
-		}
-		return -1;
-	}
-
-	return candidate;
-}
-
-
-int DRM(dma_enqueue)(struct file *filp, drm_dma_t *d)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int		  i;
-	drm_queue_t	  *q;
-	drm_buf_t	  *buf;
-	int		  idx;
-	int		  while_locked = 0;
-	drm_device_dma_t  *dma = dev->dma;
-	DECLARE_WAITQUEUE(entry, current);
-
-	DRM_DEBUG("%d\n", d->send_count);
-
-	if (d->flags & _DRM_DMA_WHILE_LOCKED) {
-		int context = dev->lock.hw_lock->lock;
-
-		if (!_DRM_LOCK_IS_HELD(context)) {
-			DRM_ERROR("No lock held during \"while locked\""
-				  " request\n");
-			return -EINVAL;
-		}
-		if (d->context != _DRM_LOCKING_CONTEXT(context)
-		    && _DRM_LOCKING_CONTEXT(context) != DRM_KERNEL_CONTEXT) {
-			DRM_ERROR("Lock held by %d while %d makes"
-				  " \"while locked\" request\n",
-				  _DRM_LOCKING_CONTEXT(context),
-				  d->context);
-			return -EINVAL;
-		}
-		q = dev->queuelist[DRM_KERNEL_CONTEXT];
-		while_locked = 1;
-	} else {
-		q = dev->queuelist[d->context];
-	}
-
-
-	atomic_inc(&q->use_count);
-	if (atomic_read(&q->block_write)) {
-		add_wait_queue(&q->write_queue, &entry);
-		atomic_inc(&q->block_count);
-		for (;;) {
-			current->state = TASK_INTERRUPTIBLE;
-			if (!atomic_read(&q->block_write)) break;
-			schedule();
-			if (signal_pending(current)) {
-				atomic_dec(&q->use_count);
-				remove_wait_queue(&q->write_queue, &entry);
-				return -EINTR;
-			}
-		}
-		atomic_dec(&q->block_count);
-		current->state = TASK_RUNNING;
-		remove_wait_queue(&q->write_queue, &entry);
-	}
-
-	for (i = 0; i < d->send_count; i++) {
-		idx = d->send_indices[i];
-		if (idx < 0 || idx >= dma->buf_count) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Index %d (of %d max)\n",
-				  d->send_indices[i], dma->buf_count - 1);
-			return -EINVAL;
-		}
-		buf = dma->buflist[ idx ];
-		if (buf->filp != filp) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Process %d using buffer not owned\n",
-				  current->pid);
-			return -EINVAL;
-		}
-		if (buf->list != DRM_LIST_NONE) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Process %d using buffer %d on list %d\n",
-				  current->pid, buf->idx, buf->list);
-		}
-		buf->used	  = d->send_sizes[i];
-		buf->while_locked = while_locked;
-		buf->context	  = d->context;
-		if (!buf->used) {
-			DRM_ERROR("Queueing 0 length buffer\n");
-		}
-		if (buf->pending) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Queueing pending buffer:"
-				  " buffer %d, offset %d\n",
-				  d->send_indices[i], i);
-			return -EINVAL;
-		}
-		if (buf->waiting) {
-			atomic_dec(&q->use_count);
-			DRM_ERROR("Queueing waiting buffer:"
-				  " buffer %d, offset %d\n",
-				  d->send_indices[i], i);
-			return -EINVAL;
-		}
-		buf->waiting = 1;
-		if (atomic_read(&q->use_count) == 1
-		    || atomic_read(&q->finalization)) {
-			DRM(free_buffer)(dev, buf);
-		} else {
-			DRM(waitlist_put)(&q->waitlist, buf);
-			atomic_inc(&q->total_queued);
-		}
-	}
-	atomic_dec(&q->use_count);
-
-	return 0;
-}
-
-static int DRM(dma_get_buffers_of_order)(struct file *filp, drm_dma_t *d,
-					 int order)
-{
-	drm_file_t    *priv   = filp->private_data;
-	drm_device_t  *dev    = priv->dev;
-	int		  i;
-	drm_buf_t	  *buf;
-	drm_device_dma_t  *dma = dev->dma;
-
-	for (i = d->granted_count; i < d->request_count; i++) {
-		buf = DRM(freelist_get)(&dma->bufs[order].freelist,
-					d->flags & _DRM_DMA_WAIT);
-		if (!buf) break;
-		if (buf->pending || buf->waiting) {
-			DRM_ERROR("Free buffer %d in use: filp %p (w%d, p%d)\n",
-				  buf->idx,
-				  buf->filp,
-				  buf->waiting,
-				  buf->pending);
-		}
-		buf->filp     = filp;
-		if (copy_to_user(&d->request_indices[i],
-				 &buf->idx,
-				 sizeof(buf->idx)))
-			return -EFAULT;
-
-		if (copy_to_user(&d->request_sizes[i],
-				 &buf->total,
-				 sizeof(buf->total)))
-			return -EFAULT;
-
-		++d->granted_count;
-	}
-	return 0;
-}
-
-
-int DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma)
-{
-	int		  order;
-	int		  retcode = 0;
-	int		  tmp_order;
-
-	order = DRM(order)(dma->request_size);
-
-	dma->granted_count = 0;
-	retcode		   = DRM(dma_get_buffers_of_order)(filp, dma, order);
-
-	if (dma->granted_count < dma->request_count
-	    && (dma->flags & _DRM_DMA_SMALLER_OK)) {
-		for (tmp_order = order - 1;
-		     !retcode
-			     && dma->granted_count < dma->request_count
-			     && tmp_order >= DRM_MIN_ORDER;
-		     --tmp_order) {
-
-			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
-								tmp_order);
-		}
-	}
-
-	if (dma->granted_count < dma->request_count
-	    && (dma->flags & _DRM_DMA_LARGER_OK)) {
-		for (tmp_order = order + 1;
-		     !retcode
-			     && dma->granted_count < dma->request_count
-			     && tmp_order <= DRM_MAX_ORDER;
-		     ++tmp_order) {
-
-			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
-								tmp_order);
-		}
-	}
-	return 0;
-}
-
-#endif /* __HAVE_OLD_DMA */
 
 
 #if __HAVE_DMA_IRQ
diff --git a/linux/drm_init.h b/linux/drm_init.h
index 2d6b6a3c..3aa4ad59 100644
--- a/linux/drm_init.h
+++ b/linux/drm_init.h
@@ -50,11 +50,6 @@ static void DRM(parse_option)(char *s)
 	for (c = s; *c && *c != ':'; c++); /* find : or \0 */
 	if (*c) r = c + 1; else r = NULL;  /* remember remainder */
 	*c = '\0';			   /* terminate */
-	if (!strcmp(s, "noctx")) {
-		DRM(flags) |= DRM_FLAG_NOCTX;
-		DRM_INFO("Server-mediated context switching OFF\n");
-		return;
-	}
 	if (!strcmp(s, "debug")) {
 		DRM(flags) |= DRM_FLAG_DEBUG;
 		DRM_INFO("Debug messages ON\n");
diff --git a/linux/gamma_context.h b/linux/gamma_context.h
index f5d2993c..9e4b913f 100644
--- a/linux/gamma_context.h
+++ b/linux/gamma_context.h
@@ -173,12 +173,11 @@ int DRM(context_switch)(drm_device_t *dev, int old, int new)
 		return -EINVAL;
 	}
 
-	if (DRM(flags) & DRM_FLAG_NOCTX) {
-		DRM(context_switch_complete)(dev, new);
-	} else {
-		sprintf(buf, "C %d %d\n", old, new);
-		DRM(write_string)(dev, buf);
-	}
+	/* This causes the X server to wake up & do a bunch of hardware
+	 * interaction to actually effect the context switch.
+	 */
+	sprintf(buf, "C %d %d\n", old, new);
+	DRM(write_string)(dev, buf);
 
 	atomic_dec(&q->use_count);
 
diff --git a/linux/gamma_drv.c b/linux/gamma_drv.c
index b08d04bf..52b8983f 100644
--- a/linux/gamma_drv.c
+++ b/linux/gamma_drv.c
@@ -41,6 +41,7 @@
 #include "drm_bufs.h"
 #include "gamma_context.h"	/* NOTE! */
 #include "drm_dma.h"
+#include "gamma_old_dma.h"
 #include "drm_drawable.h"
 #include "drm_drv.h"
 
diff --git a/linux/gamma_drv.h b/linux/gamma_drv.h
index 2f7d3588..2509ffbb 100644
--- a/linux/gamma_drv.h
+++ b/linux/gamma_drv.h
@@ -59,6 +59,16 @@ extern int  gamma_dma(struct inode *inode, struct file *filp,
 extern int  gamma_find_devices(void);
 extern int  gamma_found(void);
 
+/* Gamma-specific code pulled from drm_dma.h:
+ */
+extern void	     DRM(clear_next_buffer)(drm_device_t *dev);
+extern int	     DRM(select_queue)(drm_device_t *dev,
+				       void (*wrapper)(unsigned long));
+extern int	     DRM(dma_enqueue)(struct file *filp, drm_dma_t *dma);
+extern int	     DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma);
+
+
+
 #define GLINT_DRI_BUF_COUNT 256
 
 #define GAMMA_OFF(reg)						   \
diff --git a/linux/gamma_old_dma.h b/linux/gamma_old_dma.h
new file mode 100644
index 00000000..43be5c80
--- /dev/null
+++ b/linux/gamma_old_dma.h
@@ -0,0 +1,300 @@
+/* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
+ * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
+ *
+ * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Rickard E. (Rik) Faith <faith@valinux.com>
+ *    Gareth Hughes <gareth@valinux.com>
+ */
+
+
+/* Gamma-specific code pulled from drm_dma.h:
+ */
+
+void DRM(clear_next_buffer)(drm_device_t *dev)
+{
+	drm_device_dma_t *dma = dev->dma;
+
+	dma->next_buffer = NULL;
+	if (dma->next_queue && !DRM_BUFCOUNT(&dma->next_queue->waitlist)) {
+		wake_up_interruptible(&dma->next_queue->flush_queue);
+	}
+	dma->next_queue	 = NULL;
+}
+
+int DRM(select_queue)(drm_device_t *dev, void (*wrapper)(unsigned long))
+{
+	int	   i;
+	int	   candidate = -1;
+	int	   j	     = jiffies;
+
+	if (!dev) {
+		DRM_ERROR("No device\n");
+		return -1;
+	}
+	if (!dev->queuelist || !dev->queuelist[DRM_KERNEL_CONTEXT]) {
+				/* This only happens between the time the
+				   interrupt is initialized and the time
+				   the queues are initialized. */
+		return -1;
+	}
+
+				/* Doing "while locked" DMA? */
+	if (DRM_WAITCOUNT(dev, DRM_KERNEL_CONTEXT)) {
+		return DRM_KERNEL_CONTEXT;
+	}
+
+				/* If there are buffers on the last_context
+				   queue, and we have not been executing
+				   this context very long, continue to
+				   execute this context. */
+	if (dev->last_switch <= j
+	    && dev->last_switch + DRM_TIME_SLICE > j
+	    && DRM_WAITCOUNT(dev, dev->last_context)) {
+		return dev->last_context;
+	}
+
+				/* Otherwise, find a candidate */
+	for (i = dev->last_checked + 1; i < dev->queue_count; i++) {
+		if (DRM_WAITCOUNT(dev, i)) {
+			candidate = dev->last_checked = i;
+			break;
+		}
+	}
+
+	if (candidate < 0) {
+		for (i = 0; i < dev->queue_count; i++) {
+			if (DRM_WAITCOUNT(dev, i)) {
+				candidate = dev->last_checked = i;
+				break;
+			}
+		}
+	}
+
+	if (wrapper
+	    && candidate >= 0
+	    && candidate != dev->last_context
+	    && dev->last_switch <= j
+	    && dev->last_switch + DRM_TIME_SLICE > j) {
+		if (dev->timer.expires != dev->last_switch + DRM_TIME_SLICE) {
+			del_timer(&dev->timer);
+			dev->timer.function = wrapper;
+			dev->timer.data	    = (unsigned long)dev;
+			dev->timer.expires  = dev->last_switch+DRM_TIME_SLICE;
+			add_timer(&dev->timer);
+		}
+		return -1;
+	}
+
+	return candidate;
+}
+
+
+int DRM(dma_enqueue)(struct file *filp, drm_dma_t *d)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+	int		  i;
+	drm_queue_t	  *q;
+	drm_buf_t	  *buf;
+	int		  idx;
+	int		  while_locked = 0;
+	drm_device_dma_t  *dma = dev->dma;
+	DECLARE_WAITQUEUE(entry, current);
+
+	DRM_DEBUG("%d\n", d->send_count);
+
+	if (d->flags & _DRM_DMA_WHILE_LOCKED) {
+		int context = dev->lock.hw_lock->lock;
+
+		if (!_DRM_LOCK_IS_HELD(context)) {
+			DRM_ERROR("No lock held during \"while locked\""
+				  " request\n");
+			return -EINVAL;
+		}
+		if (d->context != _DRM_LOCKING_CONTEXT(context)
+		    && _DRM_LOCKING_CONTEXT(context) != DRM_KERNEL_CONTEXT) {
+			DRM_ERROR("Lock held by %d while %d makes"
+				  " \"while locked\" request\n",
+				  _DRM_LOCKING_CONTEXT(context),
+				  d->context);
+			return -EINVAL;
+		}
+		q = dev->queuelist[DRM_KERNEL_CONTEXT];
+		while_locked = 1;
+	} else {
+		q = dev->queuelist[d->context];
+	}
+
+
+	atomic_inc(&q->use_count);
+	if (atomic_read(&q->block_write)) {
+		add_wait_queue(&q->write_queue, &entry);
+		atomic_inc(&q->block_count);
+		for (;;) {
+			current->state = TASK_INTERRUPTIBLE;
+			if (!atomic_read(&q->block_write)) break;
+			schedule();
+			if (signal_pending(current)) {
+				atomic_dec(&q->use_count);
+				remove_wait_queue(&q->write_queue, &entry);
+				return -EINTR;
+			}
+		}
+		atomic_dec(&q->block_count);
+		current->state = TASK_RUNNING;
+		remove_wait_queue(&q->write_queue, &entry);
+	}
+
+	for (i = 0; i < d->send_count; i++) {
+		idx = d->send_indices[i];
+		if (idx < 0 || idx >= dma->buf_count) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Index %d (of %d max)\n",
+				  d->send_indices[i], dma->buf_count - 1);
+			return -EINVAL;
+		}
+		buf = dma->buflist[ idx ];
+		if (buf->filp != filp) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Process %d using buffer not owned\n",
+				  current->pid);
+			return -EINVAL;
+		}
+		if (buf->list != DRM_LIST_NONE) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Process %d using buffer %d on list %d\n",
+				  current->pid, buf->idx, buf->list);
+		}
+		buf->used	  = d->send_sizes[i];
+		buf->while_locked = while_locked;
+		buf->context	  = d->context;
+		if (!buf->used) {
+			DRM_ERROR("Queueing 0 length buffer\n");
+		}
+		if (buf->pending) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Queueing pending buffer:"
+				  " buffer %d, offset %d\n",
+				  d->send_indices[i], i);
+			return -EINVAL;
+		}
+		if (buf->waiting) {
+			atomic_dec(&q->use_count);
+			DRM_ERROR("Queueing waiting buffer:"
+				  " buffer %d, offset %d\n",
+				  d->send_indices[i], i);
+			return -EINVAL;
+		}
+		buf->waiting = 1;
+		if (atomic_read(&q->use_count) == 1
+		    || atomic_read(&q->finalization)) {
+			DRM(free_buffer)(dev, buf);
+		} else {
+			DRM(waitlist_put)(&q->waitlist, buf);
+			atomic_inc(&q->total_queued);
+		}
+	}
+	atomic_dec(&q->use_count);
+
+	return 0;
+}
+
+static int DRM(dma_get_buffers_of_order)(struct file *filp, drm_dma_t *d,
+					 int order)
+{
+	drm_file_t    *priv   = filp->private_data;
+	drm_device_t  *dev    = priv->dev;
+	int		  i;
+	drm_buf_t	  *buf;
+	drm_device_dma_t  *dma = dev->dma;
+
+	for (i = d->granted_count; i < d->request_count; i++) {
+		buf = DRM(freelist_get)(&dma->bufs[order].freelist,
+					d->flags & _DRM_DMA_WAIT);
+		if (!buf) break;
+		if (buf->pending || buf->waiting) {
+			DRM_ERROR("Free buffer %d in use: filp %p (w%d, p%d)\n",
+				  buf->idx,
+				  buf->filp,
+				  buf->waiting,
+				  buf->pending);
+		}
+		buf->filp     = filp;
+		if (copy_to_user(&d->request_indices[i],
+				 &buf->idx,
+				 sizeof(buf->idx)))
+			return -EFAULT;
+
+		if (copy_to_user(&d->request_sizes[i],
+				 &buf->total,
+				 sizeof(buf->total)))
+			return -EFAULT;
+
+		++d->granted_count;
+	}
+	return 0;
+}
+
+
+int DRM(dma_get_buffers)(struct file *filp, drm_dma_t *dma)
+{
+	int		  order;
+	int		  retcode = 0;
+	int		  tmp_order;
+
+	order = DRM(order)(dma->request_size);
+
+	dma->granted_count = 0;
+	retcode		   = DRM(dma_get_buffers_of_order)(filp, dma, order);
+
+	if (dma->granted_count < dma->request_count
+	    && (dma->flags & _DRM_DMA_SMALLER_OK)) {
+		for (tmp_order = order - 1;
+		     !retcode
+			     && dma->granted_count < dma->request_count
+			     && tmp_order >= DRM_MIN_ORDER;
+		     --tmp_order) {
+
+			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
+								tmp_order);
+		}
+	}
+
+	if (dma->granted_count < dma->request_count
+	    && (dma->flags & _DRM_DMA_LARGER_OK)) {
+		for (tmp_order = order + 1;
+		     !retcode
+			     && dma->granted_count < dma->request_count
+			     && tmp_order <= DRM_MAX_ORDER;
+		     ++tmp_order) {
+
+			retcode = DRM(dma_get_buffers_of_order)(filp, dma,
+								tmp_order);
+		}
+	}
+	return 0;
+}
+